How do I stop display timeout in GPS?

When I have this on GPS / Maps while driving, how do I keep the screen from timing out and locking? I need it to stay on. I figured, at least there was a way to configure this to not time out when plugged in. Can't find it in the battery or GPS menus. Thanks.

Rescue Squad

When I have this on GPS / Maps while driving, how do I keep the screen from timing out and locking? I need it to stay on. I figured, at least there was a way to configure this to not time out when plugged in. Can't find it in the battery or GPS menus. Thanks.

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I'm pretty sure the car dock does that automatically with it's little magnet. Put it in the car dock and the screen will stay on.

I have the same problem and did set the timeout to be 10 minutes and I could not see where I could select no timeout. It is not convenient to have to reset timeout when not using GPS/Google maps...I do not use a car dock, just a holder stuck to the windshield.
I am new to the S4 having used the Iphone for several years.
I appreciate any help I can get to solve this issue.